Have you ever felt nauseous during a tough workout? Have you ever had that butterflies in your stomach feeling from nerves or stage-fright? Like most people you probably have, and it’s because the two phenomena are closely related. While some people see nausea as a badge of honor and proof of a great workout, it isn’t necessary to push yourself until you’re doubled over in misery in order to get results. Once you understand why it happens, you can make some simple adjustments to keep it from happening in the future.